<template>
  <div id="aCoursesList" class="bg-fa of">
    <!-- /课程列表 开始 -->
    <section class="container">
      <header class="comm-title">
        <h2 class="fl tac">
          <span class="c-333">全部课程</span>
        </h2>
      </header>
      <section class="c-sort-box">
        <section class="c-s-dl">
          <dl>
            <dt>
              <span class="c-999 fsize14">课程类别</span>
            </dt>
            <dd class="c-s-dl-li">
              <ul class="clearfix">
                <li>
                  <a title="全部" href="#" @click="getAllCourse()">全部</a>
                </li>
                <li v-for="(subjectone,index) in subjectNestedList" :key="index" :class="{active:oneIndex==index}" >
                  <a :title="subjectone.title" href="#" @click="searchOne(subjectone.id,index)">{{subjectone.title}}</a>
                </li>
              </ul>
            </dd>
          </dl>
          <dl>
            <dt>
              <span class="c-999 fsize14"></span>
            </dt>
            <dd class="c-s-dl-li">
              <ul class="clearfix">
                <li v-for="(subject,index) in subSubjectList" :key="index" :class="{active:twoIndex==index}">
                  <a :title="subject.title" href="#" @click="searchTwo(subject.id,index)">{{subject.title}}</a>
                </li>
              </ul>
            </dd>
          </dl>
          <div class="clear"></div>
        </section>
        <div class="js-wrap">
          <section class="fr">
            <span class="c-ccc">
              <i class="c-master f-fM">1</i>/
              <i class="c-666 f-fM">1</i>
            </span>
          </section>

          <section class="fl">
          <ol class="js-tap clearfix">
            <li :class="{'current bg-orange':buyCountSort!=''}">
              <a title="销量" href="javascript:void(0);" @click="searchBuyCount()">销量
              <span :class="{hide:buyCountSort==''}">↓</span>
              </a>
            </li>
            <li :class="{'current bg-orange':gmtCreateSort!=''}">
              <a title="最新" href="javascript:void(0);" @click="searchGmtCreate()">最新
              <span :class="{hide:gmtCreateSort==''}">↓</span>
              </a>
            </li>
            <li :class="{'current bg-orange':priceSort!=''}">
              <a title="价格" href="javascript:void(0);" @click="searchPrice()">价格&nbsp;
                <span :class="{hide:priceSort==''}">↓</span>
              </a>
            </li>
          </ol>
        </section>

        </div>
        <div class="mt40">
          <!-- /无数据提示 开始-->
          <section class="no-data-wrap" v-if="data.total==0">
            <em class="icon30 no-data-ico">&nbsp;</em>
            <span class="c-666 fsize14 ml10 vam">没有相关数据，小编正在努力整理中...</span>
          </section>
          <!-- /无数据提示 结束-->
          <article class="comm-course-list" v-if="data.total>0">
            <ul class="of" id="bna">
              <li v-for="item in data.items" :key="item.id">
                <div class="cc-l-wrap">
                  <section class="course-img">
                    <img :src="item.cover" class="img-responsive" :alt="item.title">
                    <div class="cc-mask">
                      <a :href="'/course/'+item.id" title="开始学习" class="comm-btn c-btn-1">开始学习</a>
                    </div>
                  </section>
                  <h3 class="hLh30 txtOf mt10">
                    <a :href="'/course/'+item.id"  :title="item.title" class="course-title fsize18 c-333">{{item.title}}</a>
                  </h3>
                  <section class="mt10 hLh20 of">
                    <span class="fr jgTag bg-green" v-if="Number(item.price)===0">
                      <i class="c-fff fsize12 f-fA">免费</i>
                    </span>
                    <span class="fr jgTag bg-green" v-else>
                      <i class="c-fff fsize12 f-fA">{{item.price}}</i>
                    </span>
                    <span class="fl jgAttr c-ccc f-fA">
                      <i class="c-999 f-fA">{{item.viewCount}}人学习</i>
                      |
                      <i class="c-999 f-fA">{{item.buyCount}}人购买</i>
                    </span>
                  </section>
                </div>
              </li>
            </ul>
            <div class="clear"></div>
          </article>
        </div>
        <!-- 公共分页 开始 -->
        <div>
        <div class="paging">
          <!-- undisable这个class是否存在，取决于数据属性hasPrevious -->
          <a
            :class="{undisable: !data.hasPrevious}"
            href="#"
            title="首页"
            @click.prevent="gotoPage(1)">首</a>
          <a
            :class="{undisable: !data.hasPrevious}"
            href="#"
            title="前一页"
            @click.prevent="gotoPage(data.current-1)">&lt;</a>
          <a
            v-for="page in data.pages"
            :key="page"
            :class="{current: data.current == page, undisable: data.current == page}"
            :title="'第'+page+'页'"
            href="#"
            @click.prevent="gotoPage(page)">{{ page }}</a>
          <a
            :class="{undisable: !data.hasNext}"
            href="#"
            title="后一页"
            @click.prevent="gotoPage(data.current+1)">&gt;</a>
          <a
            :class="{undisable: !data.hasNext}"
            href="#"
            title="末页"
            @click.prevent="gotoPage(data.pages)">末</a>
          <div class="clear"/>
        </div>
      </div>
        <!-- 公共分页 结束 -->
      </section>
    </section>
    <!-- /课程列表 结束 -->
  </div>
</template>
<script>
import courseApi from '@/api/course'
export default {
  data(){
    return{
      page:1,
      data:{},
      subjectNestedList: [], // 一级分类列表
      subSubjectList: [], // 二级分类列表

      searchObj: {}, // 查询表单对象

      oneIndex:-1,
      twoIndex:-1,
      buyCountSort:"",
      gmtCreateSort:"",
      priceSort:"" 
    }
  },
  created(){
        this.initCourseFirst()
        this.initSubject()
  },
  methods:{
      initCourseFirst(){
        courseApi.getCourseList(1,8,this.searchObj)
        .then(response=>{
            this.data = response.data.data
        })
      },
      initSubject() {
        courseApi.getAllCourseList()
        .then(response=>{
          this.subjectNestedList=response.data.data.list
        })
      },
      gotoPage(page){
        courseApi.getCourseList(page,8,this.searchObj)
        .then(response=>{
            this.data = response.data.data
        })
      },
      searchOne(subjectOneId,index) {
            this.oneIndex = index

            this.twoIndex=-1
            this.searchObj.subjectParentId=""
            this.searchObj.subjectId=""
            this.subSubjectList=[]

            this.searchObj.subjectParentId = subjectOneId;

            this.gotoPage(1)

            for(let i = 0; i < this.subjectNestedList.length; i++){
              if(this.subjectNestedList[i].id == subjectOneId){
                this.subSubjectList=this.subjectNestedList[i].children;
              }
            }      
      },
      searchTwo(subjectTwoId,index) {
            this.twoIndex = index

            this.searchObj.subjectId = subjectTwoId;

            this.gotoPage(1)   
      },
    //购买量查询
    searchBuyCount() {
      this.buyCountSort = "1";
      this.gmtCreateSort = "";
      this.priceSort = "";
      this.searchObj.buyCountSort = this.buyCountSort;
      this.searchObj.gmtCreateSort = this.gmtCreateSort;
      this.searchObj.priceSort = this.priceSort;
      this.gotoPage(this.page)
    },
    //更新时间查询
    searchGmtCreate() {
      debugger
      this.buyCountSort = "";
      this.gmtCreateSort = "1";
      this.priceSort = "";
      this.searchObj.buyCountSort = this.buyCountSort;
      this.searchObj.gmtCreateSort = this.gmtCreateSort;
      this.searchObj.priceSort = this.priceSort;
      this.gotoPage(this.page)
    },
    //价格查询
    searchPrice() {
      this.buyCountSort = "";
      this.gmtCreateSort = "";
      this.priceSort = "1";
      this.searchObj.buyCountSort = this.buyCountSort;
      this.searchObj.gmtCreateSort = this.gmtCreateSort;
      this.searchObj.priceSort = this.priceSort;
      this.gotoPage(this.page)
    },
    getAllCourse() {
      this.searchObj={}
      this.gotoPage(1)
    }

  }
};
</script>
<style scoped>
  .active {
    background: #bdbdbd;
  }
  .hide {
    display: none;
  }
  .show {
    display: block;
  }
</style>